B4J Question how do I protect the assets within the .jar from theft or changes?

You can encrypt the files with B4XEncryption and add the encrypted files to the project.

have some code example ?
just so I have a sense of how to transform encrypted files into objects or the like?

B4XEncryption uses password. I think if we write the password in the code, the code may be easily decompiled and the password will be revealed. But I don't know any way to avoid this.

The jarsigner can be used to avoid modification but I didn't find it can protect files from being copied.